669461517 has 10 divisors (see below), whose sum is σ = 1000059918. Its totient is φ = 446307624.

The previous prime is 669461509. The next prime is 669461531. The reversal of 669461517 is 715164966.

It can be written as a sum of positive squares in only one way, i.e., 644601321 + 24860196 = 25389^2 + 4986^2 .

It is not a de Polignac number, because 669461517 - 2³ = 669461509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669461537) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4132398 + ... + 4132559.

Almost surely, 2^669461517 is an apocalyptic number.

It is an amenable number.

669461517 is a deficient number, since it is larger than the sum of its proper divisors (330598401).

669461517 is an equidigital number, since it uses as much as digits as its factorization.

669461517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8264969 (or 8264960 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 669461517 is about 25873.9544136570. The cubic root of 669461517 is about 874.7995260995.

The spelling of 669461517 in words is "six hundred sixty-nine million, four hundred sixty-one thousand, five hundred seventeen".